Frostburg mining journal. [volume] (Frostburg, Md.) 1871-1913, 1887-07-09
AMONG THE SCIENTISTS.
Subjects Interesting Specialists Through
out the Entire World.

SUBJECTS Interesting Specialists Through
out the Entire World.
The Natural History Museum had a
spring opening, which took place about the
middle of May. The most noted among the
new exhibits, and which created considerable
attention on the opening day, was a collection
of birds, consisting Of eighteen groups, each
representing pair of brds-with their nests
and the eggs or young-of the different varie-
ties found within fifty miles of New York. 1t
is the first collection of its kind in this country.
An interesting series of experiments
has been made by DIR. j. w. Fraser on the in
fiuence of our common beverages on digestion.
Among these drinks he finds that water is usu-
ally the best. OF infusons, tea or cocoa acts
most favorably when bread is eaten, and coffee
is the best for use with meat or eggs. Eggs are
the best animal food with infused beverages,
and should be soft boiled when tea is the bev-
erage and hard boiled with coffee cocoa.
Charles Brush built some time ago a
powerful dynamo for use in Cowles. Ala, for
disengaging aluminium from clay SO economi-
cally as to make the metal an article of COM
merce. A contemporary says this dynamo
weighs 1900 pounds requires 5OO-horse power
Tor its operation, and has an armature of forty
seven inches diameter, in the making of which
$3.50 pounds of copper wire were used.
The New York Electrical Society are
to make a grand display at the American Insti-
tute Exhibition next autumn. The exhibition
Will include all that is newest, and special and
interesting feature will be the storage of cleo
tricity and its application to the transmission
of power. This promises to be the best eectri-
cal exhibition ever held in this country.
A substance resembling ivory of creamy
wilderness and great hardness is made from po-
tatoes washed in diluted sulphuric acid, then
boiled In the same solution until they become
solid and dense. They are then washed free
from the acid and slowly dried. This ivory
can be dyed and turned and made useful in
many ways.
A temperature of $40 degrees will pro-
duce dark blue color on polished steel, and
500 degrees pale blue. The temper for Ian
Gets is obtained at $50 degrees Fahrenheit,
axes at 800 degrees, swords and watch springs
at $50 degrees, small saws at $40 degrees, and
large saws at 500 degrees.
A new discovery is that by the use of
citric acid or citrate of silver seawater may be
made drinkable. BY this means chloride of
silver is preciptated and a harmless mineral
water is produced. An ounce of citrate makes
half pint of water drinkable.
Geo. E. Doering, Phi. D., says that an
alcoholic solution of oil of wintergreen rubbed
on the marble slab of a soda fountain will keep
the flies away and not prove disagreeabe to
customers. 1t is well known that all essential
oils are poisonous to insects
A San Francisco concern is making
handsome pressed bricks out of coal ashes and
cinders. These bricks have stood the severest
tests for strength, and are made without bak-
ing or burning.
1t is a curious scientific fact that all
the elements of the poison found in a rattle
snake are inherent in the common Irish potato.